Test: add jvm backend test for named class object

compiler/testData/codegen/box/classes/extensionOnNamedClassObject.kt

@@ -0,0 +1,12 @@
+class C() {
+    class object Foo
+}
+
+fun C.Foo.create() = 3
+
+fun box(): String {
+    val c1 = C.Foo.create()
+    val c2 = C.create()
+    return if (c1 == 3 && c2 == 3) "OK" else "fail"
+}
+

compiler/testData/codegen/box/classes/namedClassObject.kt

@@ -0,0 +1,12 @@
+class C() {
+    class object Foo {
+        fun create() = 3
+    }
+}
+
+fun box(): String {
+    val c1 = C.Foo.create()
+    val c2 = C.create()
+    return if (c1 == 3 && c2 == 3) "OK" else "fail"
+}
+

compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxCodegenTestGenerated.java

@@ -1004,6 +1004,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             doTest(fileName);
         }
 
+        @TestMetadata("extensionOnNamedClassObject.kt")
+        public void testExtensionOnNamedClassObject() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/classes/extensionOnNamedClassObject.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("funDelegation.kt")
         public void testFunDelegation() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/classes/funDelegation.kt");
@@ -1388,6 +1394,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             doTest(fileName);
         }
 
+        @TestMetadata("namedClassObject.kt")
+        public void testNamedClassObject() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/classes/namedClassObject.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("outerThis.kt")
         public void testOuterThis() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/classes/outerThis.kt");